William b



(NoMbdeL) W; E. HARRIS.

ORB GRINDING AND AMALGAMATING MACHINE. I No. 259,011. Patented June 6, 1882. 3W

WITNESSES: INVBNTOR; 1

- ATTORNEYS.

N. PRTERS, Phclo-Lilhngrapher. Washing uuuuuu c.

U IT D STATES PATENT OFFICE.

ILLIAM E. HARRIS, on NEW YORK, NY.

' ORE GRINDING AND AMALGAMATING MACHINE.

SPECIFICATION forming part of Letters Patent'No. 259,011, dated June 6, 1882. Application filed September 28, 1881. (No model.)

Figure 1 is a plan view of a part of myim provement, the driving-pulley being removed. Fig. 2 is a sectional side elevation of the same, taken through the line a: as, Fig. 1.

The object of this invention is to facilitate the grinding and amalgamating of ores.

The invention consists in the combination, with the grinding-plates, the ring grindingpla-tes, and the trough, of copper plates, whereby the ore will be finely ground and thoroughly amalgamated, as will. be hereinafter fully described. v

A represents the frame of the machine.

To the upper part of the frame A is attached a bearing, B, in which revolves a vertical shaft, H.

To the upper end of the shaftH is attached a pulley D, to receive the driving-belt.

To the lower end of the vertical shaft H is keyed or otherwise secured the upper grinding-plate, J, which is strengthened by a plate,

K, bolted to its upper side, as shown in Fig. 2.

To the upper side of the plate Kis attached a hopper, L, to receive the ore.

Through the middle parts of the plates KJ are formed openings, through which the ore passes into the space between the upper grinding-plate, J, and the lower grinding-plate, M. The lower face of the upper grinding-plate, J, is made conical, as shown in Fig. 2,.and has angular or V-shaped. grooves N formed in it to serve as a dress for crushing or breaking the ore. The face of the lower or stationary grinding-plate, M, has radial grooves or slots 0 formed in it, to operate in connection with- Upon the upper side of the strengthening- 7 plate K are formed radial ribs R, the ends of which project beyond the edge of the said plate K, and have holes formed through them to receive the upper ends of the spindles a. The lower ends of the spindles a pass through and serve as journals for the ring-plates S, placed within the trough Q, and resting upon the lining-plates T, attached to the bottom of the said trough Q. In the upper sides of the lining-plates T are formed longitudinal grooves 11, to serve as a dress, in connection with the ring-plates S, for grinding the ore. To the inner surface of the outer sides of the trough Q are bolted lining-plates U, against which the outer sides of the ring-plates S work. The trough Q is securely bolted to the frame A.

Through a screw-hole in the center of the strengthening-plate P passes a hand-screw, V, upon the upper end of which rests and revolves the lower end of the upright shaft H, that carries the upper grinding-plate, J, so that the said upper grinding-plate, J, can be adjusted at any desired distance from the lower grinding-plate, M, as the character of the ore may require. The hand-screw V is provided with ajam-nut, W, for looking it in place when adjusted.

, With this construction, asthe ore is fed into the hopper L it passes into the space between the grinding-plates J M and is crushed. As the ore is crushed it is fed outward by centrifugal force, and escapes at the outer edges of the grinding-plates J M into the trough Q,

where it is further ground and pulverized between the ring grinding-plates S and the lining-plates T U, attached to the said trough Q, about all of which there is nothing new, the same being shown in a pending application.

When the machine is used for amalgamating, a copper plate, 0, is attached to the ends of the ribs R, and is made of such a width that its lower edge will be at a little distance from the upper sides of the ring-plates S. A copper plate, d, is also attached to the inner surface of the outer wall of the trough Q, the said copper plate at being made of such a breadth as to extend from the upper edge of the said outer wall of the trough Q to the up per edge of the lining-plate U.

In amalgamatin g ore, ground pulp is fed into the hopper L, in connection with a sufficient quantity of water to carry ott the tailings from the amalgainator. A quantity of quicksilver-say about ten pounds-is put into the trough Q, and the upper grinding-plate, J, is

revolved at a speed of not more than thirty revolutions a minute. The pulp, as it escapes from the grinding-plates J M, will pass down along the inner side of the copper plate a into the ring grinding-plates S, and will be ground very fine, on account of the slow flow of water ver being added occasionally until the trough contains about one hundred pounds.

I am aware that it is not broadly new to subject the mercury and pulp to centrifugal ac* tion to increase the action of gravity, and 1 therefore do not claim such; but

YVhatI do claim, and desire to secure by Letters Patent, is

In an ore grinding and amalgamating machine, the combination, with the grindingplates J M, the ring grinding-plates S, and the trough Q, of the copper plates 0 d, substan tially as herein shown and described, whereby the ore will be finely ground and thoroughly amalgamated, as set forth.

WILLIAM EDWARD HARRIS.

Witnesses: I

J AMES T. GRAHAM, (J. SEDGWICK. 

